U.S. patent application number 17/347625 was filed with the patent office on 2021-12-23 for respirator mask with exhalation filter.
The applicant listed for this patent is MSA Technology, LLC. Invention is credited to Adam Bilger, Aaron Tyler Jewitt, Kayleigh Nichelle Westbrook.
Application Number | 20210393997 17/347625 |
Document ID | / |
Family ID | 1000005665874 |
Filed Date | 2021-12-23 |
United States Patent
Application |
20210393997 |
Kind Code |
A1 |
Jewitt; Aaron Tyler ; et
al. |
December 23, 2021 |
RESPIRATOR MASK WITH EXHALATION FILTER
Abstract
A respirator mask includes a face piece configured for
contacting at least a portion of a face of a user, a head harness
for attaching the respirator mask to a head of the user, at least
one opening on the face piece, and at least one filter associated
with the opening on the face piece. The at least one filter is
configured to facilitate a passage of ambient air to an interior of
the face piece in a first direction. The at least one filter is
further configured to facilitate a passage of air exhaled by the
user wearing the respirator mask in a second direction opposite the
first direction from the interior of the face piece to the ambient
air and reduce a passage of aerosolized particulate matter exhaled
by the user in the second direction.
Inventors: |
Jewitt; Aaron Tyler;
(Valencia, PA) ; Westbrook; Kayleigh Nichelle;
(Toronto, OH) ; Bilger; Adam; (Cranberry Township,
PA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
MSA Technology, LLC |
Cranberry Township |
PA |
US |
|
|
Family ID: |
1000005665874 |
Appl. No.: |
17/347625 |
Filed: |
June 15, 2021 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
63041539 |
Jun 19, 2020 |
|
|
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A62B 18/08 20130101;
A62B 18/084 20130101; A62B 23/02 20130101; A62B 18/025
20130101 |
International
Class: |
A62B 23/02 20060101
A62B023/02; A62B 18/08 20060101 A62B018/08; A62B 18/02 20060101
A62B018/02 |
Claims
1. A respirator mask, comprising: a face piece configured for
contacting at least a portion of a face of a user; a head harness
configured for attaching the respirator mask to a head of the user;
at least one opening on the face piece; and at least one filter
associated with the opening on the face piece, wherein the at least
one filter is configured to facilitate a passage of ambient air to
an interior of the face piece in a first direction, and wherein the
at least one filter is configured to facilitate a passage of air
exhaled by the user wearing the respirator mask in a second
direction opposite the first direction from the interior of the
face piece to the ambient air and reduce a passage of aerosolized
particulate matter exhaled by the user in the second direction.
2. The respirator mask of claim 1, wherein the at least one filter
is a valveless, two-way filter.
3. The respirator mask of claim 1, wherein the at least one filter
comprises a first connector, wherein the opening on the face piece
comprises a second connector, and wherein the first connector and
the second connector are configured to permit removable attachment
of the at least one filter to the face piece.
4. The respirator mask of claim 1, wherein the at least one filter
meets bacterial and viral filtering efficiency for medical or
non-medical use.
5. The respirator mask of claim 1, further comprising a speech
diaphragm connected to a speech opening on the face piece
positioned in front of a mouth of the user.
6. The respirator mask of claim 5, wherein the speech diaphragm is
an acoustic membrane and wherein an elastomeric gasket surrounds a
perimeter of the acoustic membrane.
7. The respirator mask of claim 6, wherein the face piece comprises
a recess surrounding the speech opening, and wherein the gasket is
received within the recess.
8. The respirator mask of claim 7, wherein the gasket has a first
sealing surface configured for making a first point of contact with
the recess and a second sealing surface configured for making a
second point of contact with the recess.
9. The respirator mask of claim 1, wherein the at least one filter
comprises a first filter and a second filter, wherein the first
filter is configured for preferential flow in the first direction
and secondary flow in the second direction, and wherein the second
filter is configured for preferential flow in the second direction
and secondary flow in the first direction.
10. A respirator mask, comprising: a face piece configured for
contacting at least a portion of a face of a user; a head harness
configured for attaching the respirator mask to a head of the user;
an air inlet on the face piece, the air inlet having at least one
first filter configured to facilitate a passage of ambient air to
an interior of the face piece in a first direction; an air outlet
on the face piece, the air outlet having at least one second filter
configured to facilitate a passage of air exhaled by the user
wearing the respirator mask in a second direction opposite the
first direction from the interior of the face piece to the ambient
air and reduce a passage of aerosolized particulate matter exhaled
by the user in the second direction.
11. The respirator mask of claim 10, wherein one of the air inlet
and the at least one first filter comprises a one-way air
inhalation valve that is configured to be in an open position
during inhalation and in a closed position during exhalation.
12. The respirator mask of claim 10, wherein one of the air outlet
and the at least one second filter comprises a one-way air
exhalation valve that is configured to be in an open position
during exhalation and in a closed position during inhalation.
13. The respirator mask of claim 10, wherein the at least one first
filter comprises a first connector, wherein the air inlet on the
face piece comprises a second connector, and wherein the first
connector and the second connector are configured to permit
removable attachment of the at least one first filter to the face
piece.
14. The respirator mask of claim 10, wherein the at least one
second filter comprises a first connector, wherein the air outlet
on the face piece comprises a second connector, and wherein the
first connector and the second connector are configured to permit
removable attachment of the at least one second filter to the face
piece.
15. The respirator mask of claim 10, wherein the at least one first
filter and the at least one second filter meet bacterial and viral
filtering efficiency for medical or non-medical use.
16. The respirator mask of claim 10, further comprising a speech
diaphragm connected to a speech opening on the face piece
positioned in front of a mouth of the user.
17. The respirator mask of claim 16, wherein the speech diaphragm
is an acoustic membrane and wherein an elastomeric gasket surrounds
a perimeter of the acoustic membrane.
18. The respirator mask of claim 17, wherein the face piece
comprises a recess surrounding the speech opening, and wherein the
gasket is received within the recess.
19. The respirator mask of claim 18, wherein the gasket has a first
sealing surface configured for making a first point of contact with
the recess and a second sealing surface configured for making a
second point of contact with the recess.
20. The respirator mask of claim 10, wherein the at least one
filter comprises a first filter and a second filter, wherein the
first filter is configured for preferential flow in the first
direction and secondary flow in the second direction, and wherein
the second filter is configured for preferential flow in the second
direction and secondary flow in the first direction.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to U.S. Provisional Patent
Application No. 63/041,539, filed Jun. 19, 2020, the disclosure of
which is incorporated by reference herein in its entirety.
TECHNICAL BACKGROUND
Technical Field
[0002] The present disclosure is generally directed to respirator
masks, such as full-face masks and half-face masks. In particular,
the present disclosure is directed to respirator masks having an
exhalation filter.
Technical Considerations
[0003] As is known in the art, air-purifying respirators are worn
on a user's face to protect the individual from noxious gases,
vapors, fumes, and particulates. In particular, such masks filter
the air breathed by a user to remove the noxious gases, vapors,
fumes, and particulates while enabling oxygen in the atmosphere to
reach the user. An air-purifying respirator typically includes
three parts: a face piece, a filter unit, and a head harness for
attaching the respirator to the user's head. The face piece can be
or include a full-face respirator mask, covering the entire face
and forming a seal therewith; or it can be a half-face respirator
mask, covering only the nose and mouth and forming a seal
therewith. The head harness typically consists of a yoke with
straps attached thereto. The yoke is attached to the face piece,
such that when the straps are worn, the head harness keeps the face
piece sealed against the face.
[0004] The filter unit is connected to the face piece, such as at
an air inhalation portion, and removes the noxious substances
and/or particulate matter from the air as air is inhaled into the
face piece. The filter unit may be a detachable filter unit, such
as a filter cartridge. Some respirators may have a pair of
detachable filter cartridges connected on opposing sides of the
face piece to the air inhalation portions (e.g., air inlet valves).
The face piece also includes an air exhalation portion, which
permits exhaled air to be vented directly to the outside of the
face piece, but which remains closed during inhalation so that all
inhaled air passes through the filter unit.
[0005] Exhaling air through the air exhalation portion allows
aerosolized particulate matter from the user's breath to be
introduced directly into the surrounding environment. Additionally,
moisture from the user's breath may accumulate on the air
exhalation portion during prolonged wearing of the respirator mask.
This moisture may drip to the outside environment.
[0006] Exhalation of aerosolized particulate matter from the user's
breath into the environment may pose a health risk to individuals
in close proximity to the user. For example, if the user wearing
the respirator mask is infected with an infectious disease that may
be transmitted through close contact with other individuals, such
as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2),
simple activities such as coughing, sneezing, talking, or breathing
through the respirator mask may expel aerosolized particulate
matter through the air exhalation portion, which may then present
risk of infection to other individuals in close proximity
Accordingly, it would be desirable to reduce or eliminate the
exhalation of aerosolized particulate matter through the air
exhalation portion of the respiratory mask.
SUMMARY OF THE DISCLOSURE
[0007] Generally, provided is an improved respirator mask having an
exhalation filter configured to prevent or reduce the exhalation of
aerosolized particulate matter from the user's breath. According to
some non-limiting embodiments or aspects, provided is a respirator
mask that may include a face piece configured for contacting at
least a portion of a face of a user, a head harness configured for
attaching the respirator mask to a head of the user, at least one
opening on the face piece, and at least one filter associated with
the opening on the face piece. The at least one filter may be
configured to facilitate a passage of ambient air to an interior of
the face piece in a first direction. The at least one filter may be
configured to facilitate a passage of air exhaled by the user
wearing the respirator mask in a second direction opposite the
first direction from the interior of the face piece to the ambient
air and reduce a passage of aerosolized particulate matter exhaled
by the user in the second direction.
[0008] According to some non-limiting embodiments or aspects, the
at least one filter may be a valveless, two-way filter. The at
least one filter may include a first connector, the opening on the
face piece may include a second connector, and the first connector
and the second connector may be configured to permit removable
attachment of the at least one filter to the face piece. The at
least one filter may meet bacterial and viral filtering efficiency
for medical or non-medical use.
[0009] According to some non-limiting embodiments or aspects, a
speech diaphragm may be connected to a speech opening on the face
piece positioned in front of a mouth of the user. The speech
diaphragm may be an acoustic membrane and an elastomeric gasket may
surround a perimeter of the acoustic membrane. The face piece may
include a recess surrounding the speech opening, and the gasket may
be received within the recess. The gasket may have a first sealing
surface configured for making a first point of contact with the
recess and a second sealing surface configured for making a second
point of contact with the recess.
[0010] According to some non-limiting embodiments or aspects, the
at least one filter may include a first filter and a second filter,
wherein the first filter is configured for preferential flow in the
first direction and secondary flow in the second direction, and
wherein the second filter is configured for preferential flow in
the second direction and secondary flow in the first direction.
[0011] According to some non-limiting embodiments or aspects, a
respirator mask may include a face piece configured for contacting
at least a portion of a face of a user; a head harness configured
for attaching the respirator mask to a head of the user; an air
inlet on the face piece, the air inlet having at least one first
filter configured to facilitate a passage of ambient air to an
interior of the face piece in a first direction; and an air outlet
on the face piece, the air outlet having at least one second filter
configured to facilitate a passage of air exhaled by the user
wearing the respirator mask in a second direction opposite the
first direction from the interior of the face piece to the ambient
air and reduce a passage of aerosolized particulate matter exhaled
by the user in the second direction.
[0012] According to some non-limiting embodiments or aspects, one
of the air inlet and the at least one first filter may include a
one-way air inhalation valve that is configured to be in an open
position during inhalation and in a closed position during
exhalation. One of the air outlet and the at least one second
filter may include a one-way air exhalation valve that is
configured to be in an open position during exhalation and in a
closed position during inhalation.
[0013] According to some non-limiting embodiments or aspects, the
at least one first filter may include a first connector, the air
inlet on the face piece may include a second connector, and the
first connector and the second connector may be configured to
permit removable attachment of the at least one first filter to the
face piece. The at least one second filter may include a first
connector, the air outlet on the face piece may include a second
connector, and the first connector and the second connector may be
configured to permit removable attachment of the at least one
second filter to the face piece. The at least one first filter and
the at least one second filter may meet bacterial and viral
filtering efficiency for medical or non-medical use.
[0014] According to some non-limiting embodiments or aspects, a
speech diaphragm may be connected to a speech opening on the face
piece positioned in front of a mouth of the user. The speech
diaphragm may be an acoustic membrane and an elastomeric gasket may
surround a perimeter of the acoustic membrane. The face piece may
include a recess surrounding the speech opening, and the gasket may
be received within the recess. The gasket may have a first sealing
surface configured for making a first point of contact with the
recess and a second sealing surface configured for making a second
point of contact with the recess.
[0015] According to some non-limiting embodiments or aspects, the
head harness may include one or more adjustable straps.
[0016] In accordance with some non-limiting embodiments or aspects,
the respirator mask may be characterized by one or more of the
following clauses:
[0017] Clause 1: A respirator mask, comprising: a face piece
configured for contacting at least a portion of a face of a user; a
head harness configured for attaching the respirator mask to a head
of the user; at least one opening on the face piece; and at least
one filter associated with the opening on the face piece, wherein
the at least one filter is configured to facilitate a passage of
ambient air to an interior of the face piece in a first direction,
and wherein the at least one filter is configured to facilitate a
passage of air exhaled by the user wearing the respirator mask in a
second direction opposite the first direction from the interior of
the face piece to the ambient air and reduce a passage of
aerosolized particulate matter exhaled by the user in the second
direction.
[0018] Clause 2: The respirator mask of clause 1, wherein the at
least one filter is a valveless, two-way filter.
[0019] Clause 3: The respirator mask of clause 1 or 2, wherein the
at least one filter comprises a first connector, wherein the
opening on the face piece comprises a second connector, and wherein
the first connector and the second connector are configured to
permit removable attachment of the at least one filter to the face
piece.
[0020] Clause 4: The respirator mask of any of clauses 1-3, wherein
the at least one filter meets bacterial and viral filtering
efficiency for medical or non-medical use.
[0021] Clause 5: The respirator mask of any of clauses 1-4, further
comprising a speech diaphragm connected to a speech opening on the
face piece positioned in front of a mouth of the user.
[0022] Clause 6: The respirator mask of any of clauses 1-5, wherein
the speech diaphragm is an acoustic membrane and wherein an
elastomeric gasket surrounds a perimeter of the acoustic
membrane.
[0023] Clause 7: The respirator mask of any of clauses 1-6, wherein
the face piece comprises a recess surrounding the speech opening,
and wherein the gasket is received within the recess.
[0024] Clause 8: The respirator mask of any of clauses 1-7, wherein
the gasket has a first sealing surface configured for making a
first point of contact with the recess and a second sealing surface
configured for making a second point of contact with the
recess.
[0025] Clause 9: The respirator mask of any of clauses 1-8, wherein
the at least one filter comprises a first filter and a second
filter, wherein the first filter is configured for preferential
flow in the first direction and secondary flow in the second
direction, and wherein the second filter is configured for
preferential flow in the second direction and secondary flow in the
second direction.
[0026] Clause 10: A respirator mask, comprising: a face piece
configured for contacting at least a portion of a face of a user; a
head harness configured for attaching the respirator mask to a head
of the user; an air inlet on the face piece, the air inlet having
at least one first filter configured to facilitate a passage of
ambient air to an interior of the face piece in a first direction;
an air outlet on the face piece, the air outlet having at least one
second filter configured to facilitate a passage of air exhaled by
the user wearing the respirator mask in a second direction opposite
the first direction from the interior of the face piece to the
ambient air and reduce a passage of aerosolized particulate matter
exhaled by the user in the second direction.
[0027] Clause 11: The respirator mask of clause 10, wherein one of
the air inlet and the at least one first filter comprises a one-way
air inhalation valve that is configured to be in an open position
during inhalation and in a closed position during exhalation.
[0028] Clause 12: The respirator mask of clause 10 or 11, wherein
one of the air outlet and the at least one second filter comprises
a one-way air exhalation valve that is configured to be in an open
position during exhalation and in a closed position during
inhalation.
[0029] Clause 13: The respirator mask of any of clauses 10-12,
wherein the at least one first filter comprises a first connector,
wherein the air inlet on the face piece comprises a second
connector, and wherein the first connector and the second connector
are configured to permit removable attachment of the at least one
first filter to the face piece.
[0030] Clause 14: The respirator mask of any of clauses 10-13,
wherein the at least one second filter comprises a first connector,
wherein the air outlet on the face piece comprises a second
connector, and wherein the first connector and the second connector
are configured to permit removable attachment of the at least one
second filter to the face piece.
[0031] Clause 15: The respirator mask of any of clauses 10-14,
wherein the at least one first filter and the at least one second
filter meet bacterial and viral filtering efficiency for medical or
non-medical use.
[0032] Clause 16: The respirator mask of any of clauses 10-15,
further comprising a speech diaphragm connected to a speech opening
on the face piece positioned in front of a mouth of the user.
[0033] Clause 17: The respirator mask of any of clauses 10-16,
wherein the speech diaphragm is an acoustic membrane and wherein an
elastomeric gasket surrounds a perimeter of the acoustic
membrane.
[0034] Clause 18: The respirator mask of any of clauses 10-17,
wherein the face piece comprises a recess surrounding the speech
opening, and wherein the gasket is received within the recess.
[0035] Clause 19: The respirator mask of any of clauses 10-18,
wherein the gasket has a first sealing surface configured for
making a first point of contact with the recess and a second
sealing surface configured for making a second point of contact
with the recess.
[0036] Clause 20: The respirator mask of any of clauses 10-19,
wherein the at least one filter comprises a first filter and a
second filter, wherein the first filter is configured for
preferential flow in the first direction and secondary flow in the
second direction, and wherein the second filter is configured for
preferential flow in the second direction and secondary flow in the
first direction.
[0037] These and other features and characteristics of respirator
masks described herein, as well as the methods of manufacture of
such masks, will become more apparent upon consideration of the
following description and the appended claims with reference to the
accompanying drawings, all of which form a part of this
specification, wherein like reference numerals designate
corresponding parts in the various figures. It is to be expressly
understood, however, that the drawings are for the purpose of
illustration and description only.
BRIEF DESCRIPTION OF THE DRAWINGS
[0038] FIG. 1 is a front view of a full-face respirator mask
according to some non-limiting embodiments or aspects of the
present disclosure;
[0039] FIG. 2 is a side view of the respirator mask of FIG. 1;
[0040] FIG. 3 is a front view of a half-face respirator mask
according to some non-limiting embodiments or aspects of the
present disclosure;
[0041] FIG. 4 is a side view of the respirator mask of FIG. 3;
[0042] FIG. 5A is a front view of a half-face respirator mask
having an exhalation filter according to some non-limiting
embodiments or aspects of the present disclosure;
[0043] FIG. 5B is a front view of a half-face respirator mask
having an exhalation filter according to some non-limiting
embodiments or aspects of the present disclosure;
[0044] FIG. 5C is a front view of a half-face respirator mask
having an exhalation filter and a speech diaphragm according to
some non-limiting embodiments or aspects of the present
disclosure;
[0045] FIG. 6 is a front view of a half-face respirator mask having
an exhalation filter according to some non-limiting embodiments or
aspects of the present disclosure;
[0046] FIG. 7 is an inner view of a face piece of the half-face
respirator mask shown in FIG. 6;
[0047] FIG. 8 is a front view of a half-face respirator mask having
an exhalation filter according to some non-limiting embodiments or
aspects of the present disclosure;
[0048] FIG. 9 is a front view of a half-face respirator mask having
an exhalation filter and a speech diaphragm according to some
non-limiting embodiments or aspects of the present disclosure;
[0049] FIG. 10 is a partial cross-sectional view of a face piece of
the half-face respirator mask of FIG. 9 shown connected to a user's
face;
[0050] FIG. 11A is an exploded view of the half-face respirator
mask shown in FIG. 9;
[0051] FIG. 11B is a detailed cross-sectional view of the speech
diaphragm and the face piece of the half-face respirator mask shown
in FIG. 9;
[0052] FIG. 12 is a front view of a half-face respirator mask
having an exhalation filter and speech diaphragm according to some
non-limiting embodiments or aspects of the present disclosure;
and
[0053] FIG. 13 is a front view of a half-face respirator mask
having an exhalation filter according to some non-limiting
embodiments or aspects of the present disclosure.
[0054] In FIGS. 1-13 the same characters represent the same
components unless otherwise indicated.
DETAILED DESCRIPTION
[0055] As used herein, the singular form of "a", "an", and "the"
include plural referents unless the context clearly dictates
otherwise.
[0056] Spatial or directional terms, such as "left", "right",
"inner", "outer", "above", "below", and the like, relate to the
invention as shown in the drawing figures and are not to be
considered as limiting as the invention can assume various
alternative orientations.
[0057] All numbers used in the specification and claims are to be
understood as being modified in all instances by the term "about".
By "about" is meant within plus or minus twenty-five percent of the
stated value. However, this should not be considered as limiting to
any analysis of the values under the doctrine of equivalents.
[0058] Unless otherwise indicated, all ranges or ratios disclosed
herein are to be understood to encompass the beginning and ending
values and any and all subranges or subratios subsumed therein. For
example, a stated range or ratio of "1 to 10" should be considered
to include any and all subranges or subratios between (and
inclusive of) the minimum value of 1 and the maximum value of 10;
that is, all subranges or subratios beginning with a minimum value
of 1 or more and ending with a maximum value of 10 or less. The
ranges and/or ratios disclosed herein represent the average values
over the specified range and/or ratio.
[0059] The terms "first", "second", and the like are not intended
to refer to any particular order or chronology, but refer to
different conditions, properties, or elements.
[0060] All documents referred to herein are "incorporated by
reference" in their entirety.
[0061] The term "at least" is synonymous with "greater than or
equal to".
[0062] As used herein, "at least one of" is synonymous with "one or
more of". For example, the phrase "at least one of A, B, or C"
means any one of A, B, or C, or any combination of any two or more
of A, B, or C. For example, "at least one of A, B, and C" includes
A alone; or B alone; or C alone; or A and B; or A and C; or B and
C; or all of A, B, and C.
[0063] The term "includes" is synonymous with "comprises".
[0064] As used herein, the terms "parallel" or "substantially
parallel" mean a relative angle as between two objects (if extended
to theoretical intersection), such as elongated objects and
including reference lines, that is from 0.degree. to 5.degree., or
from 0.degree. to 3.degree., or from 0.degree. to 2.degree., or
from 0.degree. to 1.degree., or from 0.degree. to 0.5.degree., or
from 0.degree. to 0.25.degree., or from 0.degree. to 0.1.degree.,
inclusive of the recited values.
[0065] As used herein, the terms "perpendicular" or "substantially
perpendicular" mean a relative angle as between two objects at
their real or theoretical intersection is from 85.degree. to
90.degree., or from 87.degree. to 90.degree., or from 88.degree. to
90.degree., or from 89.degree. to 90.degree., or from 89.5.degree.
to 90.degree., or from 89.75.degree. to 90.degree., or from
89.9.degree. to 90.degree., inclusive of the recited values.
[0066] The discussion of various examples or aspects may describe
certain features as being "particularly" or "preferably" within
certain limitations (e.g., "preferably", "more preferably", or
"even more preferably", within certain limitations). It is to be
understood that the disclosure is not limited to these particular
or preferred limitations but encompasses the entire scope of the
various examples and aspects described herein.
[0067] The disclosure comprises, consists of, or consists
essentially of, the following examples or aspects, in any
combination. Various examples or aspects of the disclosure are
illustrated in separate drawing figures. However, it is to be
understood that this is simply for ease of illustration and
discussion. In the practice of the disclosure, one or more examples
or aspects shown in one drawing figure can be combined with one or
more examples or aspects shown in one or more of the other drawing
figures.
[0068] The present invention is directed to a full-face respirator
mask 100, a half-face respirator mask 102, and at least one filter
200-700b for use in connection with the full-face respirator mask
100 and/or the half-face respirator mask 102. One non-limiting
embodiment or aspect of the full-face respirator mask 100 according
to the present disclosure is illustrated in FIGS. 1-2, and another
non-limiting embodiment or aspect of the half-face respirator mask
102 according to the present disclosure is illustrated in FIGS.
3-4. In addition, certain non-limiting embodiments of the half-face
respirator mask 102 having at least one filter 200-700b are
illustrated in FIGS. 5-16. While, as discussed hereinafter, the at
least one filter 200-700b can be used in connection with and
attached to the full-face respirator mask 100 and the half-face
respirator mask 102, the at least one filter 200-700b can be
configured or adapted to attach to or fit with any type of
respirator mask, respirator, face mask, face piece, and the
like.
[0069] In some non-limiting embodiments or aspects, and as
illustrated in FIGS. 1-2, the full-face respirator mask 100
includes a head harness 104 (shown in FIG. 2), typically including
a number of adjustable straps 106, for use in attaching the mask
100 to a head of a user. The head harness 104 is attached to a face
piece 114, such that when the adjustable straps 106 are worn, the
head harness 104 keeps the face piece 114 sealed against the user's
face. Of course, any suitable head harness 104 can be used to
releasably and adjustably secure the face piece 114 to the user's
face.
[0070] With continued reference to FIGS. 1-2, the full-face
respirator mask 100 further includes the face piece 114 configured
for covering the entire face of the user and forming a seal
therewith. The face piece 114 includes a face shield 116, which is
a transparent member through which the user can view the
surrounding environment (as the full-face respirator mask 100
covers the entirety of the user's face). In some non-limiting
embodiments or aspects, the face piece 114 is made from a soft,
elastic material whose edge region is configured to follow the
contours of the user's face to create a seal against the user's
face. For example, the face piece 114 may be made from silicone or
a similar elastomeric material.
[0071] The face piece 114 further includes at least one air
exhalation portion 108 or arrangement configured to facilitate the
passage of exhaled air from the user out of an inner area 110
(shown in FIG. 2) between the user's face and an inner sidewall of
the face piece 114. In particular, as the user exhales air within
the inner area 110 of the full-face respirator mask 100, the
exhaled air moves through the air exhalation portion 108. In some
non-limiting embodiments or aspects, a single air exhalation
portion 108 may be provided on a front portion of the face piece
114. In other non-limiting embodiments or aspects, a pair of air
exhalation portions 108 may be provided on lateral sides of the
face piece 114. In further non-limiting embodiments or aspects, a
plurality of air exhalation portions 108 may be provided on the
face piece 114 to facilitate exit of exhaled air from the inner
area 110 of the face piece 114. As described herein, the exhaled
air exits the face piece 114 through the at least one air
exhalation portion 108 via the at least one filter unit 10.
[0072] With continued reference to FIGS. 1-2, the face piece 114
includes at least one (and typically two) air inhalation portions
112 or arrangements. These air inhalation portions 112 or
arrangements are used to facilitate the passage of filtered air
from a filter unit 10 into the inner area 110 of the face piece
114. In some non-limiting embodiments or aspects, the full-face
respirator mask 100 may have a pair of air inhalation portions 112
positioned on lateral sides of the face piece 114. In some
non-limiting embodiments or aspects, the at least one air
exhalation portion 108 and the at least one air inhalation portion
112 may define the same portion of the face piece 114. In such
embodiments or aspects, the full-face respirator mask 100 may be
configured for two-way filtering of inhaled air and exhaled air, as
described herein.
[0073] In some non-limiting embodiments or aspects, at least one
filter unit 10 is provided for filtering at least one of the
inhaled air and the exhaled air. The at least one filter unit 10 is
removably attachable to the full-face respirator mask 100, such as
to at least a portion of the air exhalation portion 108 and/or the
air inhalation portion 112. In some non-limiting embodiments or
aspects, the at least one filter unit 10 may be removably
attachable to the full-face respirator mask 100 via one or more
bayonet connectors 118 that are configured for interacting with
corresponding one or more grooves 11 on the at least one filter
unit 10. In other non-limiting embodiments or aspects, the at least
one filter unit 10 may be removably attachable to the full-face
respirator mask 100 using any other connection mechanism, such as
via one or more clips, snaps, interference fit, threaded
engagement, or other mechanical connection.
[0074] In other non-limiting embodiments or aspects, and as
illustrated in FIGS. 3-4, the half-face respirator mask 102
includes similar components to those discussed above in connection
with the full-face respirator mask 100, including, but not limited
to, the head harness 104 (e.g., the straps 106), the air exhalation
portion 108, the inner area 110, the air inhalation portions 112,
and the face piece 114. Accordingly, these components will not be
described in any further detail, aside from any differences
therebetween. The face piece 114 of the half-face mask 102 only
covers a portion of the user's face, and typically does not include
the face shield 116 discussed above. Instead, the user normally
wears safety glasses or the like depending upon the environment in
which he or she is working. Also, as discussed above in connection
with the full-face respirator mask 100, the half-face respirator
mask 102 may include any number of air exhalation portions 108
and/or air inhalation portions 112, where a filter unit 10 is used
in connection with or fitted to the air inhalation portions 112 of
the respirator mask 102. In some non-limiting embodiments or
aspects, the full-face respirator mask 100 and/or the half-face
respirator mask 102 may be a mask from the ADVANTAGE and/or COMFO
product lines of masks manufactured by MSA Safety, Inc. of
Cranberry, Pa.
[0075] With reference to FIG. 5A, a non-limiting embodiment or
aspect of a half-face respirator mask 102a having at least one
filter 200 (hereinafter referred to as "filter 200") will now be
discussed in greater detail. While FIG. 5A shows the half-face
respirator mask 102a, it is to be understood that the at least one
filter 200 may also be used with a full-face respirator mask, such
as shown in FIGS. 1-2. The mask 102a may have at least one first
filter 202 for filtering ambient air that is drawn into the mask
102 in a direction of arrows 126. In some embodiments or aspects,
the at least one first filter 202 may be a conventional cartridge
filter that is removably connectable to the face piece 114. In this
embodiment or aspect, the at least one first filter 202 may have a
valve that is closed during exhalation.
[0076] With continued reference to FIG. 5A, the air exhalation
portion 108 on the face piece 114 includes an air outlet 120, which
is configured or arranged to facilitate the passage of air
therethrough in a direction from the inner area 110 of the face
piece 114 toward the exterior of the face piece 114, as indicated
by arrow 122. The air outlet 120 is configured to receive an air
exhalation valve 124. In some embodiments or aspects, the air
exhalation valve 124 may be a one-way valve configured to permit
passage of exhaled air from the inner area 110 of the face piece
114 in a direction of arrow 122 and restrict passage of air in a
direction opposite to arrow 122. The air exhalation valve 124 may
be removably connected to the air outlet 120 to allow for
replacement of the air exhalation valve 124 separate from the mask
102a. For example, the air exhalation valve 124 may be connected to
the air outlet 120 by a threaded engagement, a bayonet connection,
one or more clips or connectors, via an adhesive connection,
friction interference fit, and any combination thereof.
[0077] With continued reference to FIG. 5A, a second filter 200 may
be disposed within the air outlet 120 between the inner area 110 of
the face piece 114 and the air exhalation valve 124. The second
filter 200 desirably covers the entire air outlet portion 120 such
that all exhaled air must pass through the filter 200 before
passing to the ambient air. The second filter 200 may be removably
or non-removably connected to the air exhalation valve 124. In some
non-limiting embodiments or aspects, the second filter 200 may be
removably or non-removably connected to another portion of the face
piece 114 such that the second filter 200 is in fluid communication
with the exhalation valve 124. In some non-limiting embodiments or
aspects, the second filter 200 may be spaced apart from the air
exhalation valve 124. In some non-limiting embodiments or aspects,
the second filter 200 may be disposed on an outer portion of the
air outlet 120 forward of the air exhalation valve 124. The second
filter 200 and/or the air exhalation valve 124 may be
replaceable.
[0078] The filter 200 may be configured for capturing moisture
buildup in the air outlet 120 caused by the exhalation of the
user's breath. In some non-limiting embodiments or aspects, the
filter 200 may be configured to facilitate a passage of air exhaled
by the user wearing the mask 102a in the direction of arrow 122
into the ambient air while reducing a passage of aerosolized
particulate matter exhaled by the user. In some embodiments or
aspects, the filter 200 may be configured to meet bacterial and
viral filtering efficiency requirements for medical use. In some
embodiments or aspects, the filter 200 may be configured to a lower
level of bacterial and viral filtering efficiency that is suitable
for non-medical use but provides advantages in cost, durability,
longevity, or breathing effort while still providing some level of
filtration, suitable for first responders, law enforcement, food
preparation, or other applications.
[0079] FIG. 5B shows another embodiment or aspect of the mask 102a
shown in FIG. 5A, wherein the filter 200 is positioned on an
exterior of the face piece 114 and in front of the exhalation valve
124 (shown in FIG. 5A). The remaining features of the mask 102a
shown in FIG. 5B are identical to the features of the mask 102a
shown in connection with FIG. 5A. Accordingly, a detailed
discussion of such features is omitted. In some non-limiting
embodiments or aspects, the respirator mask 102a may have a speech
diaphragm 130, such as shown in FIG. 5C. The structure and
functionality of the speech diaphragm 130 will be described in
connection with FIGS. 9-11B.
[0080] With reference to FIG. 6, a non-limiting embodiment or
aspect of the half-face respirator mask 102b having at least one
filter 300 (hereinafter referred to as "filter 300") will now be
discussed in greater detail. While FIG. 6 shows the half-face
respirator mask 102b, it is to be understood that the filter 300
may also be used with a full-face respirator mask, such as shown in
FIGS. 1-2. The filter 300 may be a combined filter configured for
filtering ambient air prior to inhalation and filtering exhaled air
prior to exhausting the exhaled air into the ambient air.
[0081] The filter 300 may include a body 302 having an air inlet
portion 301a, which is configured or arranged to facilitate the
passage of air therethrough in a direction of arrow 304, and an air
outlet portion 301b, which is configured or arranged to facilitate
the passage of exhaled air to the ambient air in a direction of
arrow 306. In some embodiments or aspects, the air inlet portion
301a and the air outlet portion 301b may be the same feature.
[0082] In some non-limiting embodiments or aspects, the air inlet
portion 301a and the air outlet portion 301b may have a filter
medium 303 positioned in the body 302. In this manner, the exhaled
air filtering efficiency is equal to the inhaled air filtering
efficiency. Inhaled air and exhaled air may be routed through a
common breathing passageway, such as a passageway defined by
combined air inlet portion 301a and air outlet portion 301b, on the
face piece 114 in the direction of arrows 304 and 306, respectively
(shown in FIG. 7). In this embodiment or aspect, the filter 300
would not have a valve that is selectively closable depending on
the direction of airflow through the filter.
[0083] In some embodiments or aspects, the filter 300 may include a
first air passage which is configured or arranged to facilitate the
passage of inhaled air therethrough in a direction of arrow 304,
and a second air passage different from the first air passage which
is configured or arranged to facilitate the passage of exhaled air
in a direction of arrow 306, such that inhalation and exhalation
pass through the different passages. Each of the passages may have
a separate filter medium 303. In some embodiments or aspects, the
two passages may share a common filter medium 303.
[0084] The body 302 may include a connector, such as one or more
grooves 11 (shown in FIGS. 1 and 3) for removably attaching the
filter 300 to the mask 102b, such as to the one or more bayonet
connectors 118 (shown in FIGS. 1 and 3). In some non-limiting
embodiments or aspects, the arrangement of the one or more grooves
11 and the one or more bayonet connectors 118 may be reversed such
that the one or more grooves 11 are provided on the face piece 118
of the mask 102b and the one or more bayonet connectors 118 are
provided on the filter 300. In some non-limiting embodiments or
aspects, the filter 300 may be removably attachable to the mask
102b using any other connection mechanism, such as via one or more
clips, snaps, interference fit, threaded engagement, or other
mechanical connection.
[0085] The filter 300 may be configured for capturing moisture
buildup in the mask 102 caused by the exhalation of the user's
breath from exiting the mask 102. In some embodiments or aspects,
the filter 300 may be configured to facilitate a passage of air
exhaled by the user wearing the respirator mask 102 in the
direction of arrow 306 into the ambient air while reducing a
passage of aerosolized particulate matter exhaled by the user. In
some embodiments or aspects, the filter 300 may be configured to
meet bacterial and viral filtering efficiency requirements for
medical use. In some embodiments or aspects, the filter 300 may be
configured to a lower level of bacterial and viral filtering
efficiency that is suitable for non-medical use but provides
advantages in cost, durability, longevity, or breathing effort
while still providing some level of filtration, suitable for first
responders, law enforcement, food preparation, or other
applications.
[0086] With reference to FIG. 8, a non-limiting embodiment or
aspect of the half-face respirator mask 102c having at least one
inhalation filter 400a (hereinafter referred to as "inhalation
filter 400a") and at least one exhalation filter 400b (hereinafter
referred to as "exhalation filter 400b") will now be discussed in
greater detail. While FIG. 8 shows the half-face respirator mask
102c, it is to be understood that the inhalation filter 400a and
the exhalation filter 400b may also be used with a full-face
respirator mask, such as shown in FIGS. 1-2.
[0087] With continued reference to FIG. 8, the mask 102c includes
the face piece 114 having an air inhalation portion 112 on a first
lateral side of the face piece 114 and an air exhalation portion
108 on a second lateral side of the face piece 114. The air
inhalation portion 112 is configured to facilitate the passage of
filtered air from the inhalation filter 400a into the inner area of
the face piece 114. The air exhalation portion 108 is configured to
facilitate the passage of exhaled air from the inner area of the
face piece 114 into the ambient air via the exhalation filter
400b.
[0088] The inhalation filter 400a and the exhalation filter 400b
each have a body 402 having a connector, such as one or more
grooves 11 (shown in FIGS. 1 and 3) for removably attaching the
inhalation filter 400a and the exhalation filter 400b to the mask
102c, such as to the one or more bayonet connectors 118 (shown in
FIGS. 1 and 3). In some non-limiting embodiments or aspects, the
arrangement of the one or more grooves 11 and the one or more
bayonet connectors 118 may be reversed such that the one or more
grooves 11 are provided on the face piece 118 of the mask 102c and
the one or more bayonet connectors 118 are provided on the
inhalation filter 400a and the exhalation filter 400b. In some
non-limiting embodiments or aspects, the inhalation filter 400a and
the exhalation filter 400b may be removably attachable to the mask
102c using any other connection mechanism, such as via one or more
clips, snaps, interference fit, threaded engagement, or other
mechanical connection.
[0089] Each of the inhalation filter 400a and the exhalation filter
400b has a one-way valve 404. For the inhalation filter 400a, the
one-way valve 404 is configured to be in an open position during
inhalation of air and in a closed position during exhalation of
air. Conversely, for the exhalation filter 400b, the one-way valve
404 is configured to be in a closed position during inhalation and
in an open position during exhalation of air. In this manner, the
inhalation filter 400a is configured to facilitate a passage of
filtered air into the inner area 110 of the face piece 114 in the
direction of arrow 406 and prevent the passage of exhaled air in a
direction opposite to the direction of arrow 406. Conversely, the
exhalation filter 400b is configured to facilitate a passage of air
exhaled by the user from the inner area 110 of the face piece 114
in the direction of arrow 408 while reducing a passage of
aerosolized particulate matter exhaled by the user, and prevent the
passage of ambient air into the inner area 110 of the face piece
114 in a direction opposite to the direction of arrow 408.
[0090] In some non-limiting embodiments or aspects, at least one of
the inhalation filter 400a and the exhalation filter 400b may be
configured to meet bacterial and viral filtering efficiency
requirements for medical use. In some embodiments or aspects, at
least one of the inhalation filter 400a and the exhalation filter
400b may be configured to a lower level of bacterial and viral
filtering efficiency that is suitable for non-medical use but
provides advantages in cost, durability, longevity, or breathing
effort while still providing some level of filtration, suitable for
first responders, law enforcement, food preparation, or other
applications.
[0091] With reference to FIG. 9, a non-limiting embodiment or
aspect of the half-face respirator mask 102d having at least one
filter 500 (hereinafter referred to as "filter 500") will now be
discussed in greater detail. The respirator mask 102d shown in FIG.
9 is substantially identical to the respirator mask 102b shown in
FIG. 6. Similarly, the filter 500 shown in FIG. 9 is substantially
identical to the filter 300 shown in FIG. 6. Accordingly, only the
relative differences between the embodiments or aspects shown in
FIGS. 6 and 9 will be described in detail.
[0092] With continued reference to FIG. 9, the respirator mask 102d
has a speech diaphragm 130 that is configured to make it easier to
hear the user's voice when speaking while wearing the mask 102. The
speech diaphragm 130 may be fixed to the front portion of the face
piece 114 in an area directly in front of the user's mouth, such as
shown in FIG. 10. In some non-limiting embodiments or aspects, the
speech diaphragm 130 has a housing 131 and an acoustic membrane 133
that is configured to vibrate during speech. The speech diaphragm
130 is configured to improve the sound quality of the user's voice
by reducing or eliminating the attenuation of the sound waves
provided by the face piece 114. In some embodiments or aspects, the
speech diaphragm 130 provides a sealed connection between the
acoustic membrane 133 and the face piece 114, while improving
transmission of acoustic pressure waves generated by speech from
the inside of the face piece 114 to the outside of the face piece
114.
[0093] With reference to FIG. 11A, the face piece 114 has an
opening 140 configured for receiving the speech diaphragm 130. In
some non-limiting embodiments or aspects, the speech diaphragm 130
has a gasket 142 surrounding an outer perimeter of the speech
diaphragm 130. The speech diaphragm 130 may have a circular shape
and the gasket 142 may have a ring shape that is configured to fit
around the perimeter of the circular speech diaphragm 130. The
gasket 142 may be made from an elastomeric material and is
configured to seal against the opening 140 on face piece 114 when
the gasket 142 and the speech diaphragm 130 are inserted into the
opening 140. A yoke 160 may have a retainer 162 for preventing the
diaphragm 130 from falling out of the face piece 114. The retainer
162 may have one or more openings 164 to permit unmuffled travel of
sound waves from the speech diaphragm 130. The yoke 160 has a pair
of slots 168 on opposing sides of the retainer 162 configured for
connecting to the one or more adjustable straps 106 of the head
harness 104 (shown in FIGS. 1-4).
[0094] In some non-limiting embodiments or aspects, such as shown
in FIG. 11B, the opening 140 may have a shroud 144 configured to
receive the gasket 142 within the shroud 144. The shroud 144 may be
integrally formed with the face piece 114, or it may be removably
attachable to the face piece 114. The shroud 144 may surround the
opening 140 and extend away from the opening 140 such that a recess
146 is defined between an outer surface 148 of the face piece 114
and an inner surface 150 of the shroud 144. The gasket 142 is
positioned within the recess 146 and may have a first sealing
surface 143a that seals against the shroud 144 at a first point of
contact and a second sealing surface 143b that seals against the
shroud 144 at a second point of contact, as shown in FIG. 11B. The
first sealing surface 143a and the second sealing surface 143b are
circumferentially continuous around the gasket 142. In this manner,
the gasket 142 prevents air from coming into the inner area 110 or
out of the inner area 110 of the face piece 114 via the opening
140.
[0095] With reference to FIG. 12, a non-limiting embodiment or
aspect of the half-face respirator mask 102e having at least one
filter 600 (hereinafter referred to as "filter 600") will now be
discussed in greater detail. The respirator mask 102e shown in FIG.
12 is substantially identical to the respirator mask 102d shown in
FIG. 9. Similarly, the filter 600 shown in FIG. 12 is substantially
identical to the filter 500 shown in FIG. 9. Accordingly, only the
relative differences between the embodiments or aspects shown in
FIGS. 9 and 12 will be described in detail.
[0096] The filter 600 in FIG. 12 comprises a first filter 600a and
a second filter 600b. In some non-limiting embodiments or aspects,
the first and second filters 600a, 600b may be configured to permit
preferential directional breathing. Both the first filter 600a and
the second filter 600b may be configured to facilitate the passage
of air into the face piece 114 and out of the face piece 114.
However, the first filter 600a may be configured to permit more air
to flow into the face piece 114 in a direction of arrow 602 than
the second filter 600b in the direction of arrow 604. Similarly,
the second filter 600b may be configured to permit more air to flow
out the face piece 114 in a direction of arrow 606 than the first
filter 600a in the direction of arrow 608.
[0097] With reference to FIG. 13, a non-limiting embodiment or
aspect of the half-face respirator mask 102f having at least one
inhalation filter 700a (hereinafter referred to as "inhalation
filter 700a") and at least one exhalation filter 700b (hereinafter
referred to as "exhalation filter 700b") will now be discussed in
greater detail. While FIG. 13 shows the half-face respirator mask
102f, it is to be understood that the inhalation filter 700a and
the exhalation filter 700b may also be used with a full-face
respirator mask, such as shown in FIGS. 1-2. The respirator mask
102f shown in FIG. 13 is substantially identical to the respirator
mask 102d shown in FIG. 9, so a detailed discussion of the features
of the respirator mask 102f will be omitted.
[0098] Each of the inhalation filter 700a and the exhalation filter
700b has a one-way valve 704. For the inhalation filter 700a, the
one-way valve 704 is configured to be in an open position during
inhalation of air and in a closed position during exhalation of
air. Conversely, for the exhalation filter 700b, the one-way valve
704 is configured to be in a closed position during inhalation and
in an open position during exhalation of air. In this manner, the
inhalation filter 700a is configured to facilitate a passage of
filtered air into the inner area 110 of the face piece 114 in the
direction of arrow 706 and prevent the passage of exhaled air in a
direction opposite to the direction of arrow 706. Conversely, the
exhalation filter 700b is configured to facilitate a passage of air
exhaled by the user from the inner area 110 of the face piece 114
in the direction of arrow 708 while reducing a passage of
aerosolized particulate matter exhaled by the user, and prevent the
passage of ambient air into the inner area 110 of the face piece
114 in a direction opposite to the direction of arrow 708.
[0099] In some non-limiting embodiments or aspects, at least one of
the inhalation filter 700a and the exhalation filter 700b may be
configured to meet bacterial and viral filtering efficiency
requirements for medical use. In some embodiments or aspects, at
least one of the inhalation filter 700a and the exhalation filter
700b may be configured to a lower level of bacterial and viral
filtering efficiency that is suitable for non-medical use but
provides advantages in cost, durability, longevity, or breathing
effort while still providing some level of filtration, suitable for
first responders, law enforcement, food preparation, or other
applications.
[0100] The non-limiting embodiments or aspects of the present
disclosure have been described in detail herein. However, it will
be appreciated by those skilled in the art that various
modifications and alternatives to the embodiments or aspects may be
made without departing from the concepts disclosed in the foregoing
description. Such modifications are to be considered as included
within the following claims unless the claims, by their language,
expressly state otherwise. Accordingly, the particular embodiments
or aspects described in detail hereinabove are illustrative only
and are not limiting as to the scope of the disclosure, which is to
be given the full breadth of the appended claims and any and all
equivalents thereof.
* * * * *